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          linux挂载新磁盘
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        <p>磁盘挂载有两种情况</p>
<ol>
<li>临时挂载: 这时可以使用mount命令直接挂在到某个目录</li>
<li>持久挂载: 这时不建议直接使用mount命令方式挂在,而是使用修改/etc/fstab的方式,执行 <code>mount -a</code></li>
</ol>
<p>临时挂在比较简单, 举个例子</p>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mount /dev/xxxx /media/upan</span><br></pre></td></tr></table></figure>

<p>大多数情况还是持久挂载磁盘,刚好阿里云服务器需要挂载一块100G的磁盘,以此为例</p>
<ul>
<li><code>fdisk -l</code> 查看已经接入的磁盘</li>
</ul>
<p><img src="images/1.png"></p>
<ul>
<li><code>df -h</code> 看到 dev/vdb 没有被挂载</li>
</ul>
<p><img src="images/2.png"></p>
<ul>
<li>首先用fdisk，分区</li>
</ul>
<p><img src="images/3.png"></p>
<ul>
<li>完成后如图,看到vdb磁盘增加分区vdb1</li>
</ul>
<p><img src="images/4.png"></p>
<ul>
<li>格式化为ext4 <figure class="highlight bash"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mkfs.ext4 /dev/vdb1</span><br></pre></td></tr></table></figure></li>
</ul>
<p><img src="images/5.png"></p>
<ul>
<li>挂载信息写入 /etc/fastab</li>
</ul>
<p><img src="images/7.png"></p>
<ul>
<li>mount -a 重新挂载未挂载的磁盘, <code>df -h </code>再次检查磁盘是否挂在完成</li>
</ul>
<p><img src="images/8.png"></p>
<p>注: 之所以使用fstab挂载,是因为mount挂载的方式重启后失效, 大多数情况还是要写入到fstab, fstab文件在重启后如果有问题导致系统挂掉.<code>mount -a</code>除了对没有挂载的磁盘进行挂载外,也可以顺便检测fstab文件格式是否正确</p>

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